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CASH FLOW INFORMATION - Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Feb. 27, 2018	May 17, 2017	Mar. 23, 2017	Mar. 31, 2018
Restricted Stock Units | Directors
Non-cash investing and financing activities
Granted (in shares)		25,197
Aggregate fair value		$ 255
2015 EIP Plan | Restricted Stock Units
Non-cash investing and financing activities
Granted (in shares)	37,346			37,436
Aggregate fair value	$ 512
2015 EIP Plan | Restricted Stock Units | John C. Wobensmith
Non-cash investing and financing activities
Granted (in shares)			292,398
Aggregate fair value			$ 3,254
2015 EIP Plan | Stock Options
Non-cash investing and financing activities
Options to purchase (in shares)	122,608			122,608
Exercise price	$ 13.69			$ 13.69
Aggregate fair value	$ 926
2015 EIP Plan | Stock Options | John C. Wobensmith
Non-cash investing and financing activities
Options to purchase (in shares)			133,000
Exercise price			$ 11.13
Aggregate fair value			$ 853

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Gross number of share options (or share units) granted during the period.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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